зеркало из https://github.com/golang/tools.git
102 строки
2.8 KiB
Go
102 строки
2.8 KiB
Go
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package robustio_test
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import (
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"os"
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"path/filepath"
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"runtime"
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"testing"
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"time"
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"golang.org/x/tools/internal/robustio"
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)
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func checkOSLink(t *testing.T, err error) {
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if err == nil {
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return
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}
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t.Helper()
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switch runtime.GOOS {
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case "aix", "darwin", "dragonfly", "freebsd", "illumos", "linux", "netbsd", "openbsd", "solaris":
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// Non-mobile OS known to always support os.Symlink and os.Link.
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t.Fatal(err)
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default:
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t.Skipf("skipping due to error on %v: %v", runtime.GOOS, err)
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}
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}
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func TestFileInfo(t *testing.T) {
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// A nonexistent file has no ID.
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nonexistent := filepath.Join(t.TempDir(), "nonexistent")
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if _, _, err := robustio.GetFileID(nonexistent); err == nil {
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t.Fatalf("GetFileID(nonexistent) succeeded unexpectedly")
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}
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// A regular file has an ID.
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real := filepath.Join(t.TempDir(), "real")
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if err := os.WriteFile(real, nil, 0644); err != nil {
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t.Fatalf("can't create regular file: %v", err)
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}
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realID, realMtime, err := robustio.GetFileID(real)
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if err != nil {
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t.Fatalf("can't get ID of regular file: %v", err)
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}
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// Sleep so that we get a new mtime for subsequent writes.
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time.Sleep(2 * time.Second)
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// A second regular file has a different ID.
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real2 := filepath.Join(t.TempDir(), "real2")
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if err := os.WriteFile(real2, nil, 0644); err != nil {
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t.Fatalf("can't create second regular file: %v", err)
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}
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real2ID, real2Mtime, err := robustio.GetFileID(real2)
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if err != nil {
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t.Fatalf("can't get ID of second regular file: %v", err)
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}
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if realID == real2ID {
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t.Errorf("realID %+v == real2ID %+v", realID, real2ID)
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}
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if realMtime.Equal(real2Mtime) {
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t.Errorf("realMtime %v == real2Mtime %v", realMtime, real2Mtime)
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}
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// A symbolic link has the same ID as its target.
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t.Run("symlink", func(t *testing.T) {
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symlink := filepath.Join(t.TempDir(), "symlink")
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checkOSLink(t, os.Symlink(real, symlink))
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symlinkID, symlinkMtime, err := robustio.GetFileID(symlink)
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if err != nil {
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t.Fatalf("can't get ID of symbolic link: %v", err)
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}
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if realID != symlinkID {
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t.Errorf("realID %+v != symlinkID %+v", realID, symlinkID)
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}
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if !realMtime.Equal(symlinkMtime) {
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t.Errorf("realMtime %v != symlinkMtime %v", realMtime, symlinkMtime)
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}
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})
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// Two hard-linked files have the same ID.
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t.Run("hardlink", func(t *testing.T) {
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hardlink := filepath.Join(t.TempDir(), "hardlink")
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checkOSLink(t, os.Link(real, hardlink))
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hardlinkID, hardlinkMtime, err := robustio.GetFileID(hardlink)
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if err != nil {
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t.Fatalf("can't get ID of hard link: %v", err)
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}
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if realID != hardlinkID {
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t.Errorf("realID %+v != hardlinkID %+v", realID, hardlinkID)
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}
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if !realMtime.Equal(hardlinkMtime) {
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t.Errorf("realMtime %v != hardlinkMtime %v", realMtime, hardlinkMtime)
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}
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})
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}
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